Origin of the Family name

Ó Maonaigh - (O') Mooney/Moony/Money des. of Maonach (wealthy); the name (1) of a Roscommon famil who were anciently chiefs of Clann Murthuile; (2) of a family of the Uí Fiachrach who were seated on the southern shore of Sligo Bay, in the barony of Tireragh; and (3) of a branch of the Siol nAnmchadha, in the south-east of Co. Galway. At the end of the 16th century, the name was found in all parts of Ireland.

Mac Aodhagáin - Mac Egan, Egan, Heagan - 'son of Aodhagán' (a diminutive of Aodh (=Hugh))The name of a distinguished brehon family. They originally belonged to the district of Ui Maine in Connacht, but in the 14th and 15th centuires, branches of the family settled in Ormond, Desmond, and many other parts of Ireland where they became brehons to the local chieftains. They also kept schools of law, and many learned men and eminent professors of the same name are mentioned in the Irish annals.

Ó hAodhagáin - Heagan, Hagan, Egan, Eakin, Higgans - 'des of Aodhagán' (same translation as above); the name of (1) an Oriel family who, in the 10th and 11th centuries were lords of Dartraighte, in Co. Monaghan, and of Ui Niallain, in Co. Armagh, and to which belonged Ivor O'Hegan, the tutor of St. Malachy and founder of the church of SS. Peter and Paul at Armagh; and (2) of a family of Ely-O'Carroll, in the present Offaly. This surname, owing to the different dialectial prouniciations of the syllable 'Aodh' is variously anglicised in different parts of Ireland. In Ulster, it frequently became Ó Faodhagáin.